From worldhum.com: "Gilligan's Island, Puerto Rico
Coordinates: 17 58 N 66 55 W
Total biosphere area: 9,884 acres (4,000 hectares)
Even residents of nearby Gu√°nica, Puerto Rico have to leave the comfort of their living rooms to actually visit Gilligan‚Äôs Island. Getting there, however, is as easy as a short ferry ride‚ÄĒno three-hour tour necessary. One of many mangrove cays located about a mile off the southwestern coast, this uninhabited island lures droves of snorkelers and sunbathers year round. As a part of the larger Gu√°nica Biosphere Reserve (UNESCO has established 482 biosphere reserves worldwide), Gilligan‚Äôs Island and its surrounding subtropical dry forest illustrate our potential to successfully find a balance between conservation and development, ensuring the existence of this Caribbean attraction for decades to come."